Think you know iOS inside out? Trust us, there's way more to uncover. Unlock your iPhone's full potential with these hidden ...

How could OS X fit into a phone? Was Safari on the iPhone as full-featured as on ... There’s no branding or other words on the front of the iPhone 1 – just the outline of an app icon stenciled onto ...

and iPhone OS was renamed iOS. Along with multitasking, Apple touted more than 100 new features. Folders were added, allowing a user to create one by dragging one app icon onto another in wiggle mode.

This icon means that your iPhone's Do Not Disturb feature is enabled. When Do Not Disturb is turned on, all of your phone calls will be sent straight to voicemail. While you'll still receive texts ...